lwip: Add LwIP-based TCP/IP translator

* Makefile (prog-subdirs): Add lwip.
* config.make.in (HAVE_LIBLWIP, liblwip_CFLAGS, liblwip_LIBS): Define
variables.
* configure.ac: Check for liblwip.
* lwip/: New directory.

1 files changed, 102 insertions, 0 deletions

diff --git a/lwip/lwip-hurd.h b/lwip/lwip-hurd.h
new file mode 100644
index 00000000..9e05550b
--- /dev/null
+++ b/lwip/lwip-hurd.h
@@ -0,0 +1,102 @@
+/*
+   Copyright (C) 1995, 1996, 1999, 2000, 2002, 2007, 2017
+     Free Software Foundation, Inc.
+
+   Written by Michael I. Bushnell, p/BSG.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Translator global declarations */
+
+#ifndef LWIP_HURD_H
+#define LWIP_HURD_H
+
+#include <sys/socket.h>
+#include <hurd/ports.h>
+#include <hurd/trivfs.h>
+#include <refcount.h>
+
+struct port_bucket *lwip_bucket;
+struct port_class *socketport_class;
+struct port_class *addrport_class;
+struct port_class *shutdown_notify_class;
+
+struct port_class *lwip_protid_portclasses[2];
+struct port_class *lwip_cntl_portclasses[2];
+
+/* Which portclass to install on the bootstrap port, default to IPv4. */
+int lwip_bootstrap_portclass;
+
+mach_port_t fsys_identity;
+
+/* Trivfs control structure for lwip.  */
+struct trivfs_control *lwipcntl;
+
+/* Address family port classes. */
+enum
+{
+  PORTCLASS_INET,
+  PORTCLASS_INET6,
+};
+
+struct socket
+{
+  int sockno;
+  mach_port_t identity;
+  refcount_t refcnt;
+};
+
+/* Multiple sock_user's can point to the same socket. */
+struct sock_user
+{
+  struct port_info pi;
+  int isroot;
+  struct socket *sock;
+};
+
+/* Socket address ports. */
+struct sock_addr
+{
+  struct port_info pi;
+  union
+  {
+    struct sockaddr_storage storage;
+    struct sockaddr sa;
+  } address;
+};
+
+/* Owner of the underlying node.  */
+uid_t lwip_owner;
+
+/* Group of the underlying node.  */
+uid_t lwip_group;
+
+struct socket *sock_alloc (void);
+void sock_release (struct socket *);
+
+void clean_addrport (void *);
+void clean_socketport (void *);
+
+struct sock_user *make_sock_user (struct socket *, int, int, int);
+error_t make_sockaddr_port (int, int, mach_port_t *, mach_msg_type_name_t *);
+
+void init_ifs (void *);
+
+/* Install portclass on node NAME. */
+void translator_bind (int portclass, const char *name);
+
+#endif